Screening and concentrating apparatus



Nov. 22, 1932. E. O'TOOLE 1,833,636

SCREENING AND CONCENTRATING APPARATUS Filed Feb. 5, 1929 3 Sheets-Sheet 1 1 fin 4E0 070045, Qz mm Nov. 22, 1932; E. OTOOLE SCREENING AND CONCENTRATING APPARATUS Filed Feb. 5. 1929 3 Sheets-Sheet 2 Nov. 22, 1932. E. O'TOOLE ,5

SCREENING AND CONCENTRATING APPARATUS Filed Feb. 5,-1929 5 Sheets-Sheet 3 l Patented Nov. g g I I v v ."omrao STATES PATENT OFFICE scnnmme mconcnnrnarme Arrnwrus Application fled rebmary 5, 1929. Serial 1%. 887,888.

This invention relates to screening and The conduit 12 is provided with an annular cleaning apparatus and, while not limited bearing ring 18 adapted to be supported on thereto, relates more particularly to appaan anti-friction bearing 19 so as to take up ratus for screening and cleaning coal, ores theend thrust of the screening unit.

and similar materials, and has for its obfieet The shell 8 of the screening unit A has its 55 the provision of a novel dustproof, lar e caside walls supported for rotary movement by pacity screening apparatus having but low an anti-friction bearing ring 20.

. construction and operating costs. A central post 21 is mounted within the Another ob'ect is to rovide anapparatus shell 8 and is supported at its lower end by of this class w ich will e strong and durable a spider member 22. A downwardly and oilt- 52 and is therefore, suitable for the rough usage wardly inclined deflector plate 23 is fixedly to which it is subjected. mounted on the up'fper end of the post 21 and In the drawings: 1 terminates short 0 the side walls of the shell Figurelisavertical sectional viewthrough 8. The deflector plate 23 is ada ted to rea screening apparatusconstructed in'accordceive the material delivered by t e .wheel 6 ance with this invention. 1 and distribute it at a point adjacent the Figure 2 is a plan viewof the apparatus shell 8. partly broken away to show the screen ro- A downwardly and inwardly inclmed tating apparatus. screen member 24 is mounted below the plate Figure 3 is a sectional plan on the line 23 and has its outer edge secured to theshell 79 FEL -III of Figure 1. 8 while its central portion is cut away to form Figure i is a sectional view taken on the a port 25 leading to a second screen 26. The line 1V-IV of Figure 3. inner edge of the screen 24 is secured to a col- Beierring more particularly to the drawlecting plate 27 which is inclined inversely to 25 ings, the numeral 2 designates the outer cy-' the screen 24 and has its outer edge secured to lindrical casing of the apparatus having a to the shell 8'. I wall 3 provided with a supply hopper i whic The screen 26 is inclined inversely to the I communicates with the interior of the casing screen 24 and has its inner edge or central through a port 5, in which a multi-yaned portion secured to a shoulder 28 on the post 21 "feed-wheel 6 is mounted. The wheel 65.5 while its outer edge is secured to the shell 8. adapted to be operated by the gravity feed A collecting plate 29 is mounted below the or the material being screened and the vanes screen 26 and is inclined in the same direction of the Wheel are adapted to closely fit the as the screen 26. The plate 29 has its inner 5 walls of the port 5 so as to prevent the free edge or central portion fixedly secured, as at inflow of air throu h the port 5. 30, to the post 21 while its outer edge is se- A screening unit is rotatably mounted in cured to the shell 8. the casing 2 and comprisesa cylindricai open- The material passing through the screens top shell 8 having its lower end l d y a 24: and-26 onto the collecting lates 23 and 29, downwardly and inwardly inclined cleaning respectively, is discharged t rough ports 32 table wall 9 having its central portion cut into conduits 33 which deliver it onto the away to form an outlet port 10 which coml w tabl plate 9, I municates with an outlet conduit 12. A sec- The up er screen 24 delivers its screened 0nd cleaning table 14 s s aced' above the tamaterial t rough th art 25 onto the screen 1318 9 n 111151 the 8111118 1110 h he ta le 26 which, in turn, delivers its screened mate-' it also has its c tr l p rtm u w y t rial through ports 34'and conduits 35 onto the provide an outlet port 15 which communiup or cleaning table 14.

. 'cates with an outlet conduit 16 mounted withir is adapted to be drawn through and in the conduit 12. The tables 9 and 14 are of exhausted from the apparatus by a fan 36 and v m the air flotation type and, therefore, are proconduits 87. Inlet ports 38 and 39 havin vided with periorations 16 and riflles 17. closures 40 and 41, respectively, are provid 9 for admitting air below the cleaning tables 9 and- 14.

bodil and tli 'The fan 36 is adapted to be'operated by a motor 42 and the same motor is used to operate the screening unit A.

The shell 8 is provided with a bracket-like casting 43 having an arm 44 engaged with a spring 45 mounted in a U-shaped spring holder 46 secured on the inside of the casing 2. Archer 47 is journaled on the casting 43 and is adapted to be engaged by a cam 48 carried by a vertical shaft 49. The shaft 49 is provided with a worm-wheel 50 which is meshed with a worm 51 on a shaft 52 which is driven through gears 53 and 54 by the fan motor 42. The cam 48' is adapted to bear against the roller 47 so as to move the screening unit A clockwise and com ress the spring 45, en'to permit a sud en or uick return or counterclockwise movement 0 the screening unit by means of the spring 45, thus causing a rotary jigging action of the complete I screening unit and causing the material being screened to move around the unit.

The. refuse or heavy matter 1s caused to move to the outer edge of the tables 9 and 14 and is adapted to enter and be discharged tit) through discharge ports 56 and 57, respectlvely, and conduit 57. When screening and cleaning coal and slate, which is materially heavier than the coal, will be separated from the coal by the tables 9 and 14.

The tables 9 and 14 are provided with out- I let ports 58 and 59, respectively, leading to discharge conduits 60 and 61, respectively,

jigging action of the screening unit A will aid the screening operation and Will serve to move the material around the cleaning tables. The a1r drawn up through the tables 9 and 14 by the fan 36 will serve to remove the dust from the whole apparatus, and will alsoserveto floa the lighter material on the tables so as to cause it to move over the riflles toward the center discharge ports of thetables while the heavier materialnroves outwardl While I have shown and described one spe- ClfiC embodiment of my invention, it will be understood that I do not wish to be limited thereto, since various modifications may be made without departing from the scope of my invention as defined in the appended claims.

I claim v 1. A screening and cleaning apparatus for coal and the like-comprising a cylindrical casing provided at its top with an inlet for the material to be treated, a cylindrical screening unit mounted for oscillatory movement within-said casing, said unit comprising an outer cylindrical shell, a conical deflector plate mounted at the top of said shell and terminating short of the inside face of said shell and disposed beneaththe inlet of the casing, a-

plates, means for receiving-the material assing over said screens and delivering sai material onto one of said cleaning tables, means 'for receiving the material from-said collecting plates and delivering said material to the other of said cleaning tables; said tables being adapted to separate the lighter and heavier particles of material dellvered thereon, separate outlet ports for the heavy and light material separated b said tables, and means for causing an 'oscil atory jigging action of said screening unit within said casing.

.2. A screenin and cleaning apparatus for coal and the li e comprisin a cylindrical casing provided at its top with an inlet for the material to be treated, a cylindrical screenin unit mounted for oscillatory movement wit in said casing, inlet means for feeding the material in a measured fiow through said casing to said screening unit, said unit comprising an OlltGf'CYlllldIlCfll shell, a conical deflector plate mounted in cooperative relation with the inlet casing at the top of said shell and terminatin short of the inside face of said shell, a plura ity of reversely inclined screens fixedly mounted in said shell below said deflector plate, downwardly and outwardly inclined collecting plates fixedly mounted in the shell below each of said screens and adapted to catch the material relation within the lower end of said shell,

means for receiving the material passing over 115, .passing through the respective screens, means said screens and delivering said material onto one of said cleaning tables, means for receiving the material from said collecting plates and delivering said material to the other of said cleaning tables, said tables being adaptv ed to separate the lighter and heavier particles of material delivered thereon, separate outlet ports for the heavy and light material separated by said tables, and means for caus-' .rial to be screened is fed, a feeding wheel journaled in said inlet port and adapted to control the feed of material through 'said port to said screening unit and to prevent the free inflow of air through said port, said unit comprising an outer cylindrical shell, a downwardly and outwardly inclined conical deflector plate mounted within the top ofsaid shell beneath and in cooperative relatlon with the inlet port and terminating short of the inside face of said shell, a plurality of reversely inclined screens fixedly mounted in said shell below said deflector plate, downwardly and outwardly inclined collecting plates fixedly mounted, within the shell below each of said screens and adapted to catch the material passing through the respective screens, means for delivering the material passing over one screen to the next succeeding screen,'apair of cleaning tables fixedly mounted in vertical spaced relation within the lower end of said shell, means for receiving the material passing over said screens and delivering. said material onto one of said cleanin tables, means for receiving the materialrom'said collecting plates and delivering said material to the other of said cleaning tables, said tables being adapted to separate the lighter and heavier particles of material delivered thereon, separate outlet ports for the heavy and lightmaterial sepa-.

rated by said tables, and means for causing an oscillatory jigging action of said screening unit. I

4. A screening and cleaning apparatus for coal and the like comprising a cylindricalcasing, a cylindrical screening unit mounted for rotary movement within said casing, said un t comprising an outer cylindrical shell, a conical deflector plate mounted at the to'p'of said shell and terminating short of the inside face of said shell, a plurality of inclined screens fixedly mounted in said shell below said deflector plate, inclined collecting plates fixedly mounted below each of said screens and adapted to catch the material passing through the respective screens, means for deand delivering said material to the other of said cleaning tables, said tables being adapted to separate the lighter and heavier particles of material delivered thereon, separate outlet ports for the heavy and light material separated by said tables, means for causing a rotary jigging action of said screening unit, and means for exhausting air from said screening unit and casing, said means being adapted to cause an upfiow of air through said cleaning tables and screens.

5. A screening and cleaning apparatus for coal and the like comprising a plurality of concentric reversely inclined conical screens, ranging one above the other, means for delivering material passed over one screen to the next lower screen, aconical collecting plate concentrically disposed below. each of said screens to catch the material passing through said screens, a pair of cleaning tables concentrically disposed below the lowermost screen, means for delivering the materialpassing over said screens to one of said tables, means for delivering material from the col lecting plates to another of said tables, said tables being adapted to separate the lighter and heavier particles of material delivered thereon and separate'outlets for the lighter and heavier particles.

6. A screening apparatus comprising a casing, a screening unit mounted within the casing and comprising an open-topped shell, a conical deflector mounted concentrically within the top of the shell and having its outer periphery spaced from the walls of the shell, the casing having an inlet delivering to the deflector, a vertical series of conical screens and collector plates mounted within the shell concentrically beneath the deflector "plate, a vertical series of cleaning tables mounted concentrically within theshell and below the series of screens and collector plates, means. for delivering material from the screens and collector plates to the respective cleaning tables, separate delivery means for the tables, and means for exhausting air through the shell and from below the tables upwardly through the screens and out of the upper portion of the casing.

In testimony whereof, I have hereunto set my hand.

EDWARD OTOOLE.

livering the material passing over one screen i 65 ing the material from said collecting plates 

